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Title
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New results on gauge-invariant TMD PDFs in QCD
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Author
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Abstract
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| The renormalization properties of unintegrated (transverse-momentum dependent) parton distribution functions (TMD PDF's) are used for analyzing their completely gauge-invariant definition. To this end, the UV anomalous dimension is calculated at the one-loop order in the light-cone gauge and a consistent treatment of the extra singularities, which produce undesirable contributions in the anomalous dimensions, is given. The generalized definition of a TMD PDF, based on the renormalization procedure for the Wilson exponentials with obstructions, is proposed. The reduction of the re-defined TMD PDF to the integrated PDF's, as well as their probabilistic interpretation, are discussed. |
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Language
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English
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Source (journal)
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arXiv
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Publication
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2008
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Volume/pages
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(2008)
, p. 1-7
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Medium
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E-only publicatie
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Full text (publisher's version - intranet only)
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